US2915294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger and turbulator retainer therefor
Assignee: Young Radiator Co
•
Filing: 1958-03-19
•
Granted: 1959-12-01
•
Expires: 1978-03-19
Abstract
No abstract record available.
Inventors
- 👤 Donald W Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:40
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/026; F28F9/0278; F28F13/00; F28F13/06; F28F13/12; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/471; Y10S165/483
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1849196A
Cited
US2691991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |